Improvement in bed-bottom frames



UNITED STATES PATENT OFFICE.

FRANCIS N. FROST, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO TAYLORMANUFACTURING COMPANY, OF SAME PLACE.

IMPROVEMENT IN BED-BOTTCM FRAMES.

Specification forming part of Letters Patent No. 155,866, dated October13, 1874; application filed January 31, 1874.

To all whom it may concern Be it known that I, FRANCIS N. FROST, of NewBritain, in the county of Hartford and State of Connecticut, haveinvented certain new and useful Improvements in Bed-Bottom Frames, ofwhich the following is a specifica- JDion:

In my improved bed-bottom frame the end rails consist of a straightwooden bar and a curved sheet-metal plate secured to said bar, ashereinafter described.

In the accompanying drawing, Figure 1 is a plan view of one end of abed-bottom frame as it appears when unmounted, and which em bodies myinvention; and Fig. 2 is a similar view of the same shown in theposition Vit assumes when mounted.

My improved bed-bottom frame is designed for use in connection with anysuitable fabric, cords, or wire, which is strained taut between the endrails by means of springs or other powerful strain. In this class ofbed-bottoms as ordinarily7 made the end rails spring inward at themiddle of their length, so as to cause the middle portion of the fabricto bag.

The object of my invention is to avoid this objectionable bagging, andto cause the fabric to be strained uniformly throughout the whole widthof the bed.

I form the end rail of astraight bar of wood, A, and a metal plate, B,the inner edge of which plate is provided with a series of small holesto which to secure the springs or the fabric. The plate B is also swagedor curved edgewise in such a direction that the holes are upon the inneredge of the curve, and this plate is rigidly secured,by means of screwsor other suitable fastening, to the wooden bar A. The ends of the endrails so formed are then secured, by means of bolt-s, screws, or in anyproper manner, to the ends of the side r'ails C C, whereby said railsform a square frame. The inner edges of the curved plates B B are soplaced upon the frame that their curved inner edges face each other, aspartially shown in Fig. 1. These rails A B are then strained in the actof securing the fabric by means of the springs a or other pressure,which so springs the end rail A B, between their two ends, as to curvethe wooden barA and straighten the curved plate B, as shown in Fig. 2.

In this position the distance between the edges of the plates is uniformthroughout the whole width of `the frame, and if the springs are ofuniform strength the strain is uniform in all parts of the bed-bottom,and thereby the bagging of the fabric is prevented.

As a substitute for the curved plate B, two plates of one-half thelength of B, with their meetin g-ends abutted closely together, andsecured rmly upon the rail A, so as to assume a similar form to that ofthe plate B, may be used, and the effect or result will be the same.

I claim as my invention- In abcd-bottom frame of the class described,the end rail formed of the straight wooden bar A and the curved plate B,rigidly secured together, all substantially as described, and for thepurpose set forth.

FRANCIS N. FROST.

II'Titnesses:

MARTIN HILLs, JOHN YV. BUTLER.

